what's a heart rate trace?

A heart rate trace is simply a graph of your heart rate.

We connect an elastic belt (containing a transmitter) around your chest which emits a heart rate signal, picked up and recorded by a receiver (a watch worn on your wrist).

By logging the activities you do in a session, it's easy to identify on the graph what you were doing at each phase of your session.

From this recording I can see how hard an aerobic exercise is for you, and therefore begin to tailor the exercise to your current capacities.

Here's a copy of a heart rate trace. Click on the image to see the image in more detail.